An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.

]. Self pollination is the rule and 2 days after fertilization a stalk is formed at the base of the ovary, carrying the ovary to the ground. This mechanism is similar to that in groundnut, but different from that in bambara groundnut, where the peduncle grows to the ground[

An excellent, in-depth look at the main vegetable crops that can be grown in the Tropics, plus many less well-known plants.

].
The seeds play an important role in traditional customs in West Africa, particularly in Togo, where they are used in funeral ceremonies of the Kaby and Mauba people. This seems to have contributed largely to the survival of the crop in northern Togo[

An excellent on-line database with detailed information on over 3,200 species of useful plants of Africa.

].
This species has a symbiotic relationship with certain soil bacteria, these bacteria form nodules on the roots and fix atmospheric nitrogen. Some of this nitrogen is utilized by the growing plant but some can also be used by other plants growing nearby[